Description : Equipped: yes. Category: sporty. Convention: yes. Level : 3a to 8a. Height : 15 to 80 m. Type of rock: granite with small feldspars, moutonné but regularly fractured. Unforgettable fellings on Martinswand. Alpine character, wonderful landscapes, sporty climbing. Access road: D 417 Col de la Schlucht, parking at Trois Fours (15 mn walk).